#Question id: 12325
#Unit 10. Ecological Principles
#Question id: 11844
#Unit 6. System Physiology – Plant
The following statements are made to describe the
biosynthetic pathway of IAA;
a) IPA pathway
involves a deamination reaction to form IPA, followed by a decarboxylation
reaction to form indole-3-acetaldehyde (IAld) and then oxidized to IAA by a
specific dehydrogenase
b) IAN pathway is similar to the IPA pathway, except that
the order of the deamination and decarboxylation reactions is reversed, and
different enzymes are involved
c) IAM pathway involves the two enzymes tryptophan monooxygenase and IAM hydrolase
d) In the IAN pathway, tryptophan is first converted to
indole-3-acetaldoxime and then to indole-3-acetonitrile. The enzyme that
converts IAN to IAA is called nitrilase
Which of the following is the correct statements of about the biosynthesis of IAA?
#Question id: 3418
#Unit 11. Evolution and Behavior
Which of the best explanation of directional natural selection occur by change in environmental condition?
A. Increase in the frequency of dark-colored mutants in polluted areas, became known as industrial melanism
B. Numerous insect pests become resistant to insecticides and numerous bacteria become resistant to antibiotics.
C. A plant that is too short may not be able to compete with other plants for sunlight. However, extremely tall plants may be more susceptible to wind damage
D- Beetles move into a new environment with patches of light-green moss and dark-green shrubs, both light and dark beetles might be better hidden (and survive better) than medium-green beetles
#Question id: 23303
#General Aptitude
#Question id: 10498
#Unit 6. System Physiology – Plant
Which one of the following inhibitor that inhibits blue light–stimulated stomatal opening and the inhibition is concentration dependent, while does not block red light–stimulated opening.